CN113280901B - Method and device for determining load of vehicle - Google Patents
Method and device for determining load of vehicle Download PDFInfo
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- CN113280901B CN113280901B CN202110551316.XA CN202110551316A CN113280901B CN 113280901 B CN113280901 B CN 113280901B CN 202110551316 A CN202110551316 A CN 202110551316A CN 113280901 B CN113280901 B CN 113280901B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/03—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The embodiment of the application provides a method and a device for determining the load of a vehicle, wherein when the load of the vehicle is determined, the running parameters of the vehicle in a running time period are collected; the driving parameters comprise driving speed, output voltage and output current; determining a plurality of target time periods in the running time period according to the running speed; a plurality of target time periods, wherein the running speed corresponding to the starting time point of each target time period is different from the running speed corresponding to the ending time point of the target time period; and determining the target load of the vehicle according to the running parameters corresponding to the target time periods. Therefore, the target load of the vehicle is jointly determined by collecting the running parameters of the vehicle, including the running speed, the output voltage and the output current of the vehicle, in the running time period and according to the running parameters in the target time periods, the load detector is not required to be installed in the vehicle, the load accuracy is prevented from being influenced by the failure of the load detector, and the accuracy of determining the load of the vehicle is improved.
Description
Technical Field
The present application relates to the field of vehicle technologies, and in particular, to a method and an apparatus for determining a load of a vehicle.
Background
In the running process of the new energy vehicle, if the new energy vehicle is overweight, the running safety of the new energy vehicle is affected. Therefore, in order to improve the safety of the running of the new energy vehicle, it is necessary to calculate the load of the new energy vehicle during the running of the new energy vehicle and detect whether the new energy vehicle is overweight or not based on the load.
In the prior art, when calculating the load of the new energy vehicle, a load detector is installed in the new energy vehicle, a load value of the new energy vehicle is acquired in real time through a load sensor in the load detector, and the load value is sent to a calculation center, so that the calculation center determines whether the new energy vehicle is overweight according to the load, and executes a corresponding control strategy, thereby effectively improving the running safety of the new energy vehicle.
However, when a new energy vehicle passes over a rough road, the load detector may malfunction due to a large shake, resulting in a low accuracy of the acquired load.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining a vehicle load, which can effectively improve the accuracy of the obtained load.
In a first aspect, an embodiment of the present application provides a method for determining a load of a vehicle, where the method includes:
collecting driving parameters of the vehicle in a driving time period; the driving parameters comprise driving speed, output voltage and output current.
Determining a plurality of target time periods in the running time period according to the running speed; wherein, among the plurality of target time periods, the travel speed corresponding to the start time point of each target time period is different from the travel speed corresponding to the end time point of the target time period.
And determining the target load of the vehicle according to the running parameters corresponding to the target time periods.
In one possible implementation manner, the determining the target load of the vehicle according to the running parameters corresponding to the target time periods includes:
and determining the load of the vehicle in each target time period according to the running parameters corresponding to the target time period.
And determining the target load of the vehicle according to the load of the vehicle in each target time period.
In one possible implementation manner, the determining the target load of the vehicle according to the load of the vehicle in each target time period includes:
And carrying out abnormal point removal processing on the load of the vehicle in each target time period to obtain the processed load of the vehicle in at least one target time period.
And determining the target load of the vehicle according to the load of the vehicle in the at least one target time period.
In one possible implementation manner, the determining the target load of the vehicle according to the load of the vehicle in the at least one target time period includes:
and carrying out weighted average processing on the load of the vehicle in the at least one target time period to obtain a processing result.
And determining the target load of the vehicle according to the processing result.
In one possible implementation manner, the running speed corresponding to the starting time point of the target time period is a first running speed, and the running speed corresponding to the ending time point is a second running speed; the determining the load of the vehicle in the target time period according to the running parameters corresponding to the target time period comprises the following steps:
and determining the average output voltage corresponding to the target time period according to the output voltage corresponding to the target time period.
And determining the average output current corresponding to the target time period according to the output current corresponding to the target time period.
And determining the load of the vehicle in the target time period according to the target time length, the average output voltage, the average output current, the first running speed and the second running speed corresponding to the target time period.
In one possible implementation manner, the determining the load of the vehicle in the target period according to the target duration corresponding to the target period, the average output voltage, the average output current, the first running speed and the second running speed includes:
and determining the product among the target duration, the average output voltage, the average output current and a preset loss coefficient.
An absolute value of a difference between the square value of the first travel speed and the square value of the second travel speed is determined.
And determining the load of the vehicle in the target time period according to the product and the absolute value of the difference.
In one possible implementation manner, the determining the load of the vehicle in the target period according to the product and the absolute value of the difference value includes:
determining a ratio between the product and the absolute value of the difference;
And determining the load of the vehicle in the target time period according to the ratio.
In one possible implementation, the method further includes:
and judging whether the vehicle exceeds a preset weight according to the target load of the vehicle.
And outputting overweight prompt information when the vehicle is determined to exceed the preset weight.
In a second aspect, an embodiment of the present application provides a device for determining a load of a vehicle, where the device includes:
the acquisition unit is used for acquiring driving parameters of the vehicle in a driving time period; the driving parameters comprise driving speed, output voltage and output current.
A determining unit configured to determine a plurality of target time periods within a running time period according to a running speed; wherein, among the plurality of target time periods, the travel speed corresponding to the start time point of each target time period is different from the travel speed corresponding to the end time point of the target time period.
And the processing unit is used for determining the target load of the vehicle according to the running parameters corresponding to the target time periods.
In a possible implementation manner, the processing unit is specifically configured to determine, for each target time period, a load of the vehicle in the target time period according to a running parameter corresponding to the target time period; and determining the target load of the vehicle according to the load of the vehicle in each target time period.
In a possible implementation manner, the processing unit is specifically configured to perform an anomaly removal process on the load of the vehicle in each target time period, so as to obtain the load of the vehicle in at least one processed target time period; and determining the target load of the vehicle according to the load of the vehicle in the at least one target time period.
In a possible implementation manner, the processing unit is specifically configured to perform weighted average processing on the load of the vehicle in the at least one target time period, so as to obtain a processing result; and determining the target load of the vehicle according to the processing result.
In one possible implementation manner, the running speed corresponding to the starting time point of the target time period is a first running speed, and the running speed corresponding to the ending time point is a second running speed; the processing unit is specifically configured to determine an average output voltage corresponding to the target time period according to the output voltage corresponding to the target time period; determining the average output current corresponding to the target time period according to the output current corresponding to the target time period; and determining the load of the vehicle in the target time period according to the target time length, the average output voltage, the average output current, the first running speed and the second running speed corresponding to the target time period.
In a possible implementation manner, the processing unit is specifically configured to determine a product among the target duration, the average output voltage, the average output current and a preset loss factor; determining an absolute value of a difference between the square value of the first travel speed and the square value of the second travel speed; and determining the load of the vehicle in the target time period according to the product and the absolute value of the difference.
In a possible implementation, the processing unit is specifically configured to determine a ratio between the product and the absolute value of the difference; and determining the load of the vehicle in the target time period according to the ratio.
In a possible implementation manner, the device further comprises an output unit, wherein the output unit is used for judging whether the vehicle exceeds a preset weight according to the target load of the vehicle; and outputting overweight prompt information when the vehicle is determined to exceed the preset weight.
In a third aspect, an embodiment of the present application further provides a device for determining a load of a vehicle, where the device for determining a load of a vehicle may include a memory and a processor; wherein,,
the memory is used for storing a computer program.
The processor is configured to read the computer program stored in the memory, and execute the method for determining the load of the vehicle according to any one of the possible implementation manners of the first aspect according to the computer program in the memory.
In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium, where computer executable instructions are stored, and when executed by a processor, implement a method for determining a load of a vehicle according to any one of the possible implementation manners of the first aspect.
In a fifth aspect, an embodiment of the present application further provides a computer program product, which includes a computer program, where the computer program is executed by a processor, implementing a method for determining a load of a vehicle as described in any one of the possible implementations of the first aspect.
Therefore, the embodiment of the application provides a method and a device for determining the load of a vehicle, wherein when the load of the vehicle is determined, the running parameters of the vehicle in a running time period are collected; the driving parameters comprise driving speed, output voltage and output current; determining a plurality of target time periods in the running time period according to the running speed; wherein, among the plurality of target time periods, the running speed corresponding to the starting time point of each target time period is different from the running speed corresponding to the ending time point of the target time period; and determining the target load of the vehicle according to the running parameters corresponding to the target time periods. Therefore, the target load of the vehicle is jointly determined by collecting the running parameters of the vehicle, including the running speed, the output voltage and the output current of the vehicle, in the running time period and according to the running parameters in the target time periods, the load detector is not required to be installed in the vehicle, the load accuracy is prevented from being influenced by the failure of the load detector, and the accuracy of determining the load of the vehicle is improved.
Drawings
FIG. 1 is a flow chart of a method for determining a load of a vehicle according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for determining a target load of a vehicle according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a method for determining a load of a vehicle according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a device for determining a load of a vehicle according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another apparatus for determining a load of a vehicle according to an embodiment of the present application.
Specific embodiments of the present disclosure have been shown by way of the above drawings and will be described in more detail below. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the disclosed concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
In embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In the text description of the present application, the character "/" generally indicates that the front-rear associated object is an or relationship.
The technical scheme provided by the embodiment of the application can be applied to the scene of new energy vehicle load detection. New energy vehicles include vehicles that are powered by an electric motor, such as hybrid electric vehicles, electric-only electric vehicles, fuel electric vehicles, and the like. In the running process of the new energy vehicle, if the load of the new energy vehicle exceeds the calibrated load value of the vehicle, namely, the situation of overweight occurs, the running safety of the new energy vehicle can be influenced. Therefore, in order to improve the safety of the running of the new energy vehicle, it is necessary to calculate the load of the new energy vehicle during the running of the new energy vehicle and detect whether the new energy vehicle is overweight or not based on the load.
In the prior art, when calculating the load of the new energy vehicle, a load detector is installed in the new energy vehicle, a load value of the new energy vehicle is acquired in real time through a load sensor in the load detector, and the load value is sent to a calculation center, so that the calculation center determines whether the new energy vehicle is overweight according to the load, and executes a corresponding control strategy, thereby effectively improving the running safety of the new energy vehicle.
Since the road surface condition of the new energy vehicle during the traveling process cannot be set, when the new energy vehicle passes through a relatively rugged road surface, the load detector may malfunction due to the relatively large shake of the vehicle body, thereby resulting in lower accuracy of the acquired load.
In order to solve the problem that the accuracy of the acquired load is low due to the failure of the load detector in the new energy vehicle, as the power of the new energy vehicle is derived from the battery pack in the new energy vehicle and the load of the new energy vehicle is related to the electric energy consumed by the new energy vehicle, the output voltage and the output current of the new energy vehicle can be detected, and the speed of the new energy vehicle in acceleration or deceleration can be acquired, so that the load of the vehicle can be determined according to a dynamics formula, the load detector is prevented from being installed and is not influenced by the road surface condition, and the accuracy of determining the load of the vehicle is improved.
Based on the conception, the embodiment of the application provides a method for determining the load of a vehicle, and when the load of the vehicle is determined, the driving parameters of the vehicle in the driving time period are collected; the driving parameters comprise driving speed, output voltage and output current; determining a plurality of target time periods in the running time period according to the running speed; wherein, among the plurality of target time periods, the running speed corresponding to the starting time point of each target time period is different from the running speed corresponding to the ending time point of the target time period; and determining the target load of the vehicle according to the running parameters corresponding to the target time periods.
It should be noted that, the power consuming devices such as the vehicle-mounted terminal device in the new energy vehicle are powered by the low-voltage battery, and the output voltage and the output current collected in the embodiment of the application are the output voltage and the output current of the battery pack for providing power for the vehicle.
The method provided by the embodiment of the application can directly determine the target load of the vehicle according to the running speed, the output voltage and the output current of the vehicle in a plurality of target time periods, and a load detector is not required to be installed in the vehicle, so that the influence on the load of the vehicle caused by the failure of the load detector is avoided, and the accuracy of the obtained target load is improved.
The method for determining the load of the vehicle according to the present application will be described in detail with reference to specific examples. It is to be understood that the following embodiments may be combined with each other and that some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 1 is a flow chart of a method for determining a load of a vehicle according to an embodiment of the present application. The method for determining the load of the vehicle may be performed by software and/or hardware means, which may be, for example, a vehicle load determining means, which may be a terminal or a processing chip in the terminal. For example, referring to fig. 1, the method for determining the load of the vehicle may include:
s101, collecting driving parameters of the vehicle in a driving time period.
The driving parameters comprise driving speed, output voltage and output current.
By way of example, when the driving parameters of the vehicle in the driving time period are collected, the driving speed of the vehicle can be collected in real time through the speed sensor, the output voltage can be collected in real time through the voltage collector, the output current can be collected in real time through the current collector, so that the accuracy of the collected driving parameters of the vehicle can be ensured, the driving parameters of the vehicle can be collected through other methods, and the method for collecting the driving parameters of the vehicle is not limited. In addition, the output voltage and the output current acquired in the embodiment of the application are the average value of the output voltage and the average value of the output current of the vehicle in the running time period.
It is understood that the running period may be a period when the running speed of the vehicle is 0 twice. In determining the running period of the vehicle, it is also possible to determine a running time interval corresponding to the running period of the vehicle, for example, a time when the running speed of the vehicle is 0 for the first time is 10 points 20 minutes and a time when the running speed of the vehicle is 0 for the next time is 12 points, and it is possible to determine that the running period of the vehicle is 10 points 20 minutes to 12 points and the corresponding running time interval is 100 minutes.
S102, determining a plurality of target time periods in the running time period according to the running speed.
Wherein, among the plurality of target time periods, the travel speed corresponding to the start time point of each target time period is different from the travel speed corresponding to the end time point of the target time period.
For example, when determining a plurality of target time periods within the travel time period according to the travel speed, since the travel speed corresponding to the start time point of each target time period is different from the travel speed corresponding to the end time point of the target time period, the determined plurality of target time periods are time periods in which the vehicle accelerates or decelerates within the travel time period, and after determining the plurality of target time periods within the travel time period, the target duration corresponding to each target time period, and the travel speed corresponding to the start time point of each target time period, and the travel speed corresponding to the end time point of the target time period may also be determined.
For example, the running period of the vehicle is 9 points 20 to 9 points 50 minutes, that is, the running time interval is 30 minutes, wherein the running speed of the vehicle at 9 points 20 minutes is 0, at this time, the running speed of the vehicle at 9 points 28 minutes is 40, at 9 points 28 to 9 points 35 minutes, the vehicle runs at a uniform speed, at 9 points 35 to 9 points 42 minutes, the running speed of the vehicle at 9 points 42 minutes is 60, and then the running speed of the vehicle at 9 points 42 minutes is reduced until the running speed of the vehicle at 9 points 50 minutes is 0. Therefore, the vehicle is accelerated for 2 times and decelerated for 1 time in the traveling period, it is possible to determine 3 target periods of time, which correspond to the target periods of time of 8 minutes, 7 minutes and 8 minutes, respectively, from 9 points 20 to 9 points 28 minutes, from 9 points 35 to 9 points 42 minutes, and from 9 points 42 to 9 points 50 minutes. The running speeds corresponding to the starting time point and the ending time point in the first target time period are respectively 0m/s and 40m/s, the running speeds corresponding to the starting time point and the ending time point in the second target time period are respectively 40m/s and 60m/s, and the running speeds corresponding to the starting time point and the ending time point in the third target time period are respectively 60m/s and 0m/s.
S103, determining the target load of the vehicle according to the running parameters corresponding to the target time periods.
For example, when determining the target load of the vehicle according to the running parameters corresponding to the multiple target time periods, the electric energy output by the battery pack of the vehicle in each target time period, that is, the kinetic energy of the vehicle in each target time period, may be determined according to the average value of the output voltages of the battery packs of the vehicle in each target time period, the average value of the output currents, and the corresponding target time length in each target time period; and determining the load of the vehicle in each target time period according to the kinetic energy of the vehicle in each target time period, the running speed corresponding to the starting time point in each target time period and the running speed corresponding to the ending time point in each target time period by combining a dynamics formula, thereby determining the target load of the vehicle according to the load of the vehicle in each target time period.
For example, when determining the target load of the vehicle, the determination may be performed by an in-vehicle terminal device in the vehicle, or may be performed by a remote terminal device that establishes a wireless connection with the vehicle, which is not limited in any way by the embodiment of the present application.
Therefore, according to the method for determining the load of the vehicle, provided by the embodiment of the application, the running speed, the output voltage and the output current of the vehicle in the running time period are collected, the running speed corresponding to the starting time point is determined in the running time period according to the running speed, and a plurality of target time periods which are different from the running speed corresponding to the ending time point are determined, so that the target load value of the vehicle is determined according to the running speed, the output voltage and the output current corresponding to the target time period, the load detector is not required to be installed in the vehicle, the target load of the vehicle can be automatically obtained, and the influence on the determination degree of the load of the vehicle due to the failure of the load detector is avoided, thereby improving the accuracy of determining the load of the vehicle.
For example, in the embodiment of the present application, in order to further improve the safety of the vehicle during the running process, after determining the target load of the vehicle, it may also be determined whether the vehicle exceeds the preset weight according to the target load of the vehicle; when the fact that the vehicle exceeds the preset weight is determined, overweight prompt information is output, and whether the overweight condition of the vehicle occurs or not can be obtained in real time. The preset weight is the maximum load capacity of the vehicle calibration, if the target load of the vehicle exceeds the preset weight, the overweight of the vehicle is determined, and overweight prompt information is output.
By way of example, after determining the target load of the vehicle, the target load of the vehicle may also be output in real time, so that the load of the vehicle, in particular, a new energy vehicle transporting goods, may be monitored, and the state of the goods during transportation may be monitored.
The overweight prompt information and the target load of the vehicle can be output through a vehicle-mounted terminal in the vehicle, or can be output through a mobile terminal device of a user, and the embodiment of the application is not limited in any way. When the overweight prompt information is output through the mobile terminal equipment of the user, the overweight prompt information can be output through a short message, an APP and the like, and the embodiment of the application is not particularly limited.
Based on the embodiment shown in fig. 1, in order to facilitate understanding how the target load of the vehicle is determined according to the running parameters corresponding to the plurality of target time periods in the embodiment of the present application, the embodiment shown in fig. 2 will be described in detail below, how the target load of the vehicle is determined according to the running parameters corresponding to the plurality of target time periods in the embodiment of the present application. Fig. 2 is a flow chart of a method for determining a target load of a vehicle according to an embodiment of the present application. The method for determining the target load of the vehicle may include:
S201, determining the load of the vehicle in the target time period according to the running parameters corresponding to the target time period for each target time period.
According to the embodiment shown in fig. 1, the target period is a period during which the vehicle accelerates or decelerates, and the travel parameters include the travel speed in the target period, the output voltage in the target period, and the output current in the target period.
For example, the travel speed corresponding to the start time point of the target period is the first travel speed, and the travel speed corresponding to the end time point is the second travel speed. When determining the load of the vehicle in the target time period according to the running parameters corresponding to the target time period, determining the average output voltage corresponding to the target time period according to the output voltage corresponding to the target time period; determining average output current corresponding to the target time period according to the output current corresponding to the target time period; and determining the load of the vehicle in the target time period according to the target time period, the average output voltage, the average output current, the first running speed and the second running speed corresponding to the target time period. The average output voltage is the average value of the sum of the output voltages acquired in real time, and the average output current is the average value of the sum of the output currents acquired in real time.
The target duration is, for example, a time interval between an initial time point and a termination time point of the target time period. For example, if the target period is 6 points 10 minutes to 6 points 30 minutes, the target period may be determined to be 20 minutes, i.e., 1200 seconds.
In the embodiment of the application, the load of the vehicle in the target time period is determined through the target time length, the average output voltage, the average output current, the first running speed and the second running speed corresponding to the target time period, so that the accuracy of determining the load of the vehicle in the target time period is higher, and the accuracy of determining the load of the vehicle is further improved.
When determining the load of the vehicle in the target time period according to the target time period, the average output voltage, the average output current, the first running speed and the second running speed corresponding to the target time period, determining the product among the target time period, the average output voltage, the average output current and a preset loss coefficient; determining an absolute value of a difference between the square value of the first travel speed and the square value of the second travel speed; and determining the load of the vehicle in the target time period according to the absolute value of the product and the difference value. The loss coefficient is obtained by considering that the electric energy output by the battery pack of the vehicle is used for providing kinetic energy for the vehicle and a part of loss is also generated, and represents the utilization rate of the electric energy output by the battery pack of the vehicle.
By way of example, the product between the target time period, the average output voltage, the average output current, and the preset loss factor represents the total electrical energy output by the vehicle's battery pack to power the vehicle during the target time period. From the kinetic equation, the total electric energy output by the battery pack of the vehicle for powering the vehicle is equal to the kinetic energy of the vehicle in the target time period.
According to the embodiment of the application, the load of the vehicle in the target time period is calculated through a dynamics formula, the load detector is prevented from being installed on the vehicle, and the accuracy of the load of the vehicle in the determined target time period is further improved by presetting the loss coefficient and considering that the electric energy output by the battery pack of the vehicle is not completely used for providing power for the vehicle.
Therefore, when determining the load of the vehicle in the target period based on the product and the absolute value of the difference, the ratio between the product and the absolute value of the difference may be determined first; and determining the load of the vehicle in the target time period according to the ratio.
For example, since one half of the sum of the absolute value of the difference between the square value of the first travel speed and the square value of the second travel speed and the load of the vehicle and the dead weight of the vehicle is the kinetic energy of the vehicle in the target period. Thus, the ratio between the product and the difference is a ratio between 2 times the product and the absolute value, which is the sum of the dead weight of the vehicle and the load of the vehicle. When the load of the vehicle in the target period is determined according to the ratio, the difference between the ratio and the vehicle weight is determined as the load of the vehicle in the target period.
After determining the load of the vehicle in each target period, the following S202 may be performed:
s202, determining the target load of the vehicle according to the load of the vehicle in each target time period.
When the target load of the vehicle is determined according to the load of the vehicle in each target time period, the load of the vehicle in each target time period can be subjected to abnormality removing processing to obtain the load of the vehicle in at least one processed target time period, and the problem that the accuracy of determining the target load of the vehicle is reduced due to abnormal operation of the vehicle in the running process, for example, the vehicle suddenly steps on a brake to decelerate in an emergency state in the running process, the deceleration time is short, and the error between the load of the vehicle obtained in the deceleration time period and the actual load is large can be avoided.
For example, when the abnormal point removal processing is performed on the load of the vehicle in each target period, the load of the vehicle with a large error may be removed first, for example, the load of the vehicle is a negative value, or the load of the vehicle is 2 kg, or the load of the vehicle is a large error value such as 1000 tons; after the larger error value is removed, calculating the average value of the load of the vehicle in each target time period, further calculating the standard deviation of the load of the vehicle, and removing the value of the load of the vehicle which is greater than three times of the standard deviation of the load of the vehicle, so that the load value of the vehicle after the abnormal point is removed is more accurate. The embodiment of the present application is only described by taking the above-mentioned outlier removing processing method as an example, and is not limited to this embodiment.
In order to further improve the accuracy of the determined target load of the vehicle, when the target load of the vehicle is determined according to the load of the vehicle in at least one target time period, the load of the vehicle in the at least one target time period can be weighted to obtain a processing result; and determining the target load of the vehicle according to the processing result. For example, after performing the outlier removal processing, the load value of the vehicle in 8 target time periods is obtained, a weighted average of the load values of the vehicle in 8 target time periods is calculated, and the obtained weighted average is determined as the target load of the vehicle.
In summary, according to the method for determining the load of the vehicle provided by the embodiment of the application, according to the running parameters corresponding to each target time period, the load of the vehicle in each target time period; and in addition, the target load of the vehicle is determined through the loads of a plurality of vehicles, so that the accuracy of determining the target load of the vehicle load is improved.
In order to facilitate understanding of the method for determining a vehicle load provided by the embodiment of the present application, a new energy vehicle is taken as an example of a logistic electric vehicle, and a detailed description will be given of the method for determining a vehicle load provided by the embodiment of the present application, referring to fig. 3, and fig. 3 is a schematic frame diagram of the method for determining a vehicle load provided by the embodiment of the present application.
By way of example, assuming a vehicle weight of 3500 kg for a logistic electric vehicle, the weight at a specified full load is 1000 kg. According to the illustration in fig. 3, in the use process of the logistics electric vehicle, the running parameters of the logistics electric vehicle are obtained in real time, namely, the running speed, the output voltage and the output current of the logistics electric vehicle are obtained; the driving time period [ T1, T2] is determined according to the driving parameters of the logistics vehicle, wherein T1 is the time when the driving speed of the logistics vehicle is 0, and T2 is the time when the driving speed of the logistics vehicle is 0 again.
After determining the driving time period, whether there is a target time period for acceleration or deceleration in the driving time period [ T1, T2], a specific method for determining the target time period may be described in the above embodiment, which is not repeated in the embodiments of the present application. After the target time period is determined, the running speed corresponding to the starting time point of the vehicle in the target time period, the running speed corresponding to the ending time point, the target duration, the average value of the output voltage and the average value of the output current can be determined, so that the load of the vehicle in the target time period is calculated. Assuming that the determined target duration t=10s of the logistic electric vehicle, the running speed v1=0m/s corresponding to the start time point, the running speed v2=15m/s corresponding to the end time point, the average value of the output voltage is u=554V, the average value of the output current is i=90A, and the preset loss coefficient k=0.9. According to the method of the above embodiment, the load of the vehicle of the logistics electric vehicle in the target period of time can be calculated by the following formula (1).
By bringing the driving parameters into the above formula in the target time period, the sum of the dead weight and the load of the logistics electric vehicle can be obtained to be 3989 kg, the load of the logistics electric vehicle can be determined to be 489 kg because the dead weight of the logistics electric vehicle is 3500 kg, and the target load of the vehicle can be directly determined to be 489 kg because the logistics electric vehicle only has the target time period of acceleration.
After determining the target load of the logistics electric vehicle, judging whether the logistics electric vehicle is overweight or not, namely judging the target load and the preset weight of the logistics electric vehicle in a target time period, namely the weight of the logistics electric vehicle when the logistics electric vehicle is fully loaded, if the target load of the logistics electric vehicle exceeds the preset weight, determining that the logistics electric vehicle is overweight, and outputting overweight prompt information; if the target load of the logistics electric vehicle does not exceed the preset weight, the target load of the vehicle is directly output. In the embodiment of the application, the target load of the logistics electric vehicle is 489 kg, and the preset weight is 1000 kg, namely, the target load of the logistics electric vehicle exceeds the preset weight, so that the target load of the logistics electric vehicle can be directly output. The method for outputting the target load of the vehicle and outputting the overweight prompting message according to the embodiment are described in the above embodiments, and the embodiments of the present application will not be repeated.
In the embodiment of the application, the running parameters of the vehicle are obtained in real time; the method comprises determining the target time period of acceleration or deceleration of the vehicle in the running time period of the vehicle, determining the load of the vehicle by a dynamic formula, determining the target load of the vehicle by the load of the vehicle, improving the accuracy of determining the load of the vehicle without installing a load detector, and improving the safety of the vehicle in the running process by outputting overweight prompt information when overweight,
fig. 4 is a schematic structural diagram of a vehicle load determining device 40 according to an embodiment of the present application, for example, referring to fig. 4, the vehicle load determining device 40 may include:
an acquisition unit 401, configured to acquire a driving parameter of a vehicle in a driving time period; the driving parameters comprise driving speed, output voltage and output current;
a determining unit 402 configured to determine a plurality of target time periods within a running time period according to a running speed; wherein, among the plurality of target time periods, the running speed corresponding to the starting time point of each target time period is different from the running speed corresponding to the ending time point of the target time period;
the processing unit 403 is configured to determine a target load of the vehicle according to the running parameters corresponding to the plurality of target time periods.
Optionally, the processing unit 403 is specifically configured to determine, for each target time period, a load of the vehicle in the target time period according to a running parameter corresponding to the target time period; and determining the target load of the vehicle according to the load of the vehicle in each target time period.
Optionally, the processing unit 403 is specifically configured to perform an anomaly point removal process on the load of the vehicle in each target time period, so as to obtain the processed load of the vehicle in at least one target time period; and determining the target load of the vehicle according to the load of the vehicle in at least one target time period.
Optionally, the processing unit 403 is specifically configured to perform weighted average processing on the load of the vehicle in at least one target time period, so as to obtain a processing result; and determining the target load of the vehicle according to the processing result.
Optionally, the running speed corresponding to the starting time point of the target time period is a first running speed, and the running speed corresponding to the ending time point is a second running speed; the processing unit 403 is specifically configured to determine an average output voltage corresponding to the target time period according to the output voltage corresponding to the target time period; determining average output current corresponding to the target time period according to the output current corresponding to the target time period; and determining the load of the vehicle in the target time period according to the target time period, the average output voltage, the average output current, the first running speed and the second running speed corresponding to the target time period.
Optionally, the processing unit 403 is specifically configured to determine a product among the target duration, the average output voltage, the average output current, and a preset loss factor; determining an absolute value of a difference between the square value of the first travel speed and the square value of the second travel speed; and determining the load of the vehicle in the target time period according to the absolute value of the product and the difference value.
Optionally, the processing unit 403 is specifically configured to determine a ratio between the product and the absolute value of the difference; and determining the load of the vehicle in the target time period according to the ratio.
Optionally, the device further comprises an output unit 404, and the output unit 404 is configured to determine whether the vehicle exceeds a preset weight according to a target load of the vehicle; and outputting overweight prompt information when the vehicle is determined to exceed the preset weight.
The device for determining the vehicle load provided by the embodiment of the application can execute the technical scheme of the method for determining the vehicle load in any embodiment, and the implementation principle and the beneficial effects of the device are similar to those of the method for determining the vehicle load, and can be seen, and the detailed description is omitted herein.
Fig. 5 is a schematic structural diagram of another vehicle load determining device 50 according to an embodiment of the present application, for example, referring to fig. 5, the vehicle load determining device 50 may include a processor 501 and a memory 502; wherein,,
The memory 502 is used for storing a computer program.
The processor 501 is configured to read the computer program stored in the memory 502, and execute the technical solution of the method for determining the load of the vehicle in any one of the foregoing embodiments according to the computer program in the memory 502.
Alternatively, the memory 502 may be separate or integrated with the processor 501. When the memory 502 is a device separate from the processor 501, the vehicle load determining apparatus 50 may further include: a bus for connecting the memory 502 and the processor 501.
Optionally, the present embodiment further includes: a communication interface, which may be connected to the processor 501 via a bus. The processor 501 may control the communication interface to implement the functions of receiving and transmitting the vehicle load determination device 50 described above.
The vehicle load determining device 50 according to the embodiment of the present application may execute the technical scheme of the vehicle load determining method in any of the above embodiments, and the implementation principle and beneficial effects of the method are similar to those of the vehicle load determining method, and may refer to the implementation principle and beneficial effects of the vehicle load determining method, which are not described herein.
The embodiment of the application also provides a computer readable storage medium, in which computer executing instructions are stored, when a processor executes the computer executing instructions, the technical scheme of the method for determining the vehicle load in any embodiment is realized, and the implementation principle and the beneficial effects of the method are similar to those of the method for determining the vehicle load, and can be seen, and the detailed description is omitted herein.
The embodiment of the application also provides a computer program product, which comprises a computer program, when the computer program is executed by a processor, the technical scheme of the method for determining the vehicle load in any embodiment is realized, the implementation principle and the beneficial effects of the method are similar to those of the method for determining the vehicle load, and the implementation principle and the beneficial effects of the method for determining the vehicle load can be seen, and the detailed description is omitted herein.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection illustrated or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional module is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform some steps of the methods of the embodiments of the application.
It should be understood that the above processor may be a central processing unit (english: central Processing Unit, abbreviated as CPU), or may be other general purpose processors, digital signal processors (english: digital Signal Processor, abbreviated as DSP), application specific integrated circuits (english: application Specific Integrated Circuit, abbreviated as ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.
The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present application are not limited to only one bus or to one type of bus.
The computer-readable storage medium described above may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (9)
1. A method of determining a load of a vehicle, comprising:
collecting driving parameters of the vehicle in a driving time period; wherein the driving parameters comprise driving speed, output voltage and output current; wherein the output voltage and the output current are both an output voltage and an output current of a battery pack that powers the vehicle;
Determining a plurality of target time periods in the running time period according to the running speed; wherein, among the plurality of target time periods, the travel speed corresponding to the start time point of each target time period is different from the travel speed corresponding to the end time point of the target time period;
determining a target load of the vehicle according to the running parameters corresponding to the target time periods;
the running speed corresponding to the starting time point of the target time period is a first running speed, and the running speed corresponding to the ending time point is a second running speed; the determining the load of the vehicle in the target time period according to the running parameters corresponding to the target time period comprises the following steps:
determining an average output voltage corresponding to the target time period according to the output voltage corresponding to the target time period;
determining the average output current corresponding to the target time period according to the output current corresponding to the target time period;
determining a product among a target duration, the average output voltage, the average output current and a preset loss coefficient;
determining an absolute value of a difference between the square value of the first travel speed and the square value of the second travel speed;
And determining the load of the vehicle in the target time period according to the product and the absolute value of the difference.
2. The method of claim 1, wherein determining the target load of the vehicle based on the travel parameters corresponding to the plurality of target time periods comprises:
for each target time period, determining the load of the vehicle in the target time period according to the running parameters corresponding to the target time period;
and determining the target load of the vehicle according to the load of the vehicle in each target time period.
3. The method of claim 2, wherein said determining a target load of said vehicle based on said load of said vehicle during said target time periods comprises:
carrying out abnormal point removal treatment on the load of the vehicle in each target time period to obtain the load of the vehicle in at least one treated target time period;
and determining the target load of the vehicle according to the load of the vehicle in the at least one target time period.
4. A method according to claim 3, wherein said determining a target load of said vehicle based on the load of said vehicle during said at least one target time period comprises:
Carrying out weighted average processing on the load of the vehicle in the at least one target time period to obtain a processing result;
and determining the target load of the vehicle according to the processing result.
5. The method of claim 1, wherein the determining the load of the vehicle for the target period of time based on the product and the absolute value of the difference comprises:
determining a ratio between the product and the absolute value of the difference;
and determining the load of the vehicle in the target time period according to the ratio.
6. The method according to any one of claims 1-4, further comprising:
judging whether the vehicle exceeds a preset weight according to the target load of the vehicle;
and outputting overweight prompt information when the vehicle is determined to exceed the preset weight.
7. A vehicle load determining apparatus, characterized in that the apparatus comprises:
the acquisition unit is used for acquiring driving parameters of the vehicle in a driving time period; wherein the driving parameters comprise driving speed, output voltage and output current; wherein the output voltage and the output current are both an output voltage and an output current of a battery pack that powers the vehicle;
A determining unit configured to determine a plurality of target time periods within a running time period according to a running speed; wherein, among the plurality of target time periods, the travel speed corresponding to the start time point of each target time period is different from the travel speed corresponding to the end time point of the target time period;
the processing unit is used for determining the target load of the vehicle according to the running parameters corresponding to the target time periods;
the running speed corresponding to the starting time point of the target time period is a first running speed, and the running speed corresponding to the ending time point is a second running speed; the processing unit is specifically configured to determine an average output voltage corresponding to the target time period according to the output voltage corresponding to the target time period; determining the average output current corresponding to the target time period according to the output current corresponding to the target time period;
the processing unit is specifically configured to determine a product among a target duration, the average output voltage, the average output current and a preset loss coefficient; determining an absolute value of a difference between the square value of the first travel speed and the square value of the second travel speed; and determining the load of the vehicle in the target time period according to the product and the absolute value of the difference.
8. A vehicle load determining device, comprising a memory and a processor; wherein,,
the memory is used for storing a computer program;
the processor is configured to read the computer program stored in the memory and execute a method for determining the load of a vehicle according to any one of the preceding claims 1-6 according to the computer program stored in the memory.
9. A computer readable storage medium having stored therein computer executable instructions which, when executed by a processor, implement a method of determining a load of a vehicle as claimed in any one of claims 1 to 6.
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| CN113859252B (en) * | 2021-10-29 | 2023-07-18 | 北汽福田汽车股份有限公司 | Vehicle weight determining method and device |
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